visible-light photoredox processes, was found to show excellent catalytic activities for thermal redox reactions under a catalytic amount of Cu(OAc)2. With this catalytic system, vinyl azides and ketene silyl acetals combine to form formal [3 + 2] cycloadducts by α-ester radical addition without light irradiation. This method provides a mild and straightforward paradigm to prepare important synthons of five-membered
曙红Y,可见光光氧化还原过程中常见的有机光催化剂,发现在催化量的Cu(OAc)2下对热氧化还原反应显示出优异的催化活性。在这种催化体系下,
叠氮化
乙烯和
乙烯酮甲
硅烷基
缩醛可以在不进行光照射的情况下,通过α-酯基的加成反应形成正式的[3 + 2]环加合物。该方法为制备五元烯-γ-内酰胺和桥环内酰胺的重要合成子提供了温和而直接的范例。这是
曙红Y在黑暗中催化氧化还原反应的第一个例子。